Extension-chandelier



(No Model.)

J. I'. BROWN.

BXTENSIUN GHANDBLIBR.

Patented June 2, 1885.

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illivrrnn drnrns Farrar JOHN F. BROXVN, 0F BROKLYN, NEWv YRK.

EXTENSION=CHANDEL2ER PEC'FICATION forming part of Letters Patent No. 319,061, dated June 2, 1885.

Application filed August 19, 1834. (No model.)

To all whom it may concern.-

Be it known that l, JOHN F. Bnown, of Broollyn.,county of Kings, and State of New York, have invented certain new and useful Improvements in EXtensioirGhandeliers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

illy improvements relate particularlyto the means employed for sustaining the sliding tube and its attachments in a gas-fixture at any desired elevation; but it will appear vfrom the following explanation of the device or improvements that the same may be employed in connection with oil or other chandeliers.

The object of my invention isto provide the chandelier with simple, compact, durable, efficient, and easily-operating means for sustaiuing the sliding tube or rod at any elevation to which it may be adjusted, and permit the required adjustments of the sliding parts without undue friction.

To accomplish this,the invention consists in a novel construction and arrangement of the retaining` device or clamping mechanism, as hereinafter described and claimed.

In the accompanying drawings, wherein like letters of reference indicate corresponding parts throughout, Figure l represents a partial section and elevation of so much of a slide-chandelier as is necessary for the purposes of the present description. Fig. 2 is a horizontal seetion through lineair of Fig. l. Fig. 3 is an elevation and partial sectional view of a part of the clamping device detached from the other parts -in the position which it assumes when the sliding tube or rod is being moved upwardly,

and Fig. tis alike view showing the position of the clamp when the said tube or rod is held at rest or being pulled downwardly.

A. represents the sliding tubeor rod, which may be of `any iigure in horizontal section, preferably angular, so that it may be easily prevented from turning` as it is moved up or down. B is the main or pendent tube of the 'tintura upon which side arms may or may not be mounted, and which is suspended from the ceiling or otherwise. Upon the lower end of this tube is abox, C, of any form,which contains the Vhiction-producing clamps.

Connected with the central rod or tube, A, as by the cross-bar D, are one, two, or more twisted or spirally-ribbed rods, E, preferably of smaller diameter than the sliding tube or rod A, and so located that they will move up and down in the main tube B, wherein they are concealed when the sliding portion is pushed up. rlhe rods E pass through cylinders F, the upper surfaces of which cylinders are notched or serrated, as plainly shown, and they also pass through blocks G, which are correspondingly serrated on their under surfaces, and arranged to engage with the cylinders F whenin proper place for that purpose. The blocksG fit closely upon the twisted rods E, or so that when the rods are moved down the blocks G will be compelled to revolve. -Vhen the rods are pushed upward, itis plain that the blocks will rise vfrom off the top of cylinders F, and will produce no turning eiiects thereon. They are prevented from being displaced by reason of being located in suitable recesses provided for them in the top or cap of the boi; C. Vhen the rods E arelpulled down, the blocks G engage with cylinders F and cause them to revolve.

To prevent the rods E, and thus the droplight which is connected therewith, from descending below the point to which adjusted, friction-brakes are applied to the cylinders F to prevent them from turning, and thus holding the sliding part stationary. The brakes shown are of simple construction, consisting of a piece of leather or other substance made to bear against the surface of the cylinder F, to produce the required friction. These frictionblocks may be adjusted and the amount of friction thus regulated by means of a simple set screw, a, and intermediate springs, b, or by other equivalent mea-ns. The friction being by these means regulated to correspond with the weight of the sliding part, a slight pull downwardly is all that is necessary to overcome the holding-power. The rods E may be hollow or solid, as most preferred, it being only necessary that they cause the blocks G, and through them the cylinders F, to revolve at the times and in the manner stated.

W'hen used in connection with gas apparatus, the tube A is employed to conduct the gas ICO to the movable burner, and for this reason a central supply-pipe, I, having a packing-gasket at its lower end, is employed within the tube A. In oil or other chandeliers where gas is not employed this interior tube is not necsary, and .in such cases,also,the tube A may be replaced by any rod. The screws a, for regulating the amount offrictiomare shown as passing through the ends of the box C; but they may be located at any other convenient point. From a consideration of the construction and the arrangement indicated it will readily appear that the friction-producing mechanism is not made to bear upon the sliding pipe or tube, and that this pipe or tube, if made angular, is prevented from twisting or turning by being passed tlirough a corresponding opening in the top of the box C. By employing two rods, E, the liability' of damage to the sliding parts by reason of any failure of the clamping mechanism to hold is much reduced, because it' one rod or its clamp should fail 'to work theother would prevent the too rapid descent of the slide. The movable burner or light-giving contrivauce is applied upon A in any of the usual ways. The arrangementis compact, and all the parts are readily accessible for adjustment or repairs. The action of the clamp is noiseless, and there are no parts liable to get out of order.

I am aware that in extension-chandeliers the central sliding tube or rod has heretofore been twisted or spirally ribbed and made to pass through the clamping mechanism, and I do not desire to be understood as making any claim to such construction; but7 Having nouT fully described my invention, whatI do claim as new, and desire to secure by Letters Patent, is-

l. In an extension-chandelier having a sliding tube or rod, one or more twisted or spirally-ribbed rods or tubes movable up and down simultaneously with said sliding tube or rod, and combined with friction-producing mechanism, substantially in the manner and for the purposes set forth.

2. In an extension-chandelier, the main pipe or pendant, the sliding tube or rod movable therein, one or more twisted or spirally-ribbed rods or tubes, also movable within the main V tube, and friction-producing mechanism operated by said twisted rods or tubefi,` combined and arranged substantially as shown and described.

3. The combination of the main tube B, sliding rod or tube A, one or more twisted rods,E, clamp F G, box C, and friction -produeing block H, substantially as shown and described.

In testimony that I claim the foregoing I have hereunto set my hand in the presence of 6o two witnesses.

JOHN F. BROW'N.

IVitnesses:

CHAnLns Srnvnns. L. L. PRICE. 

